Tyre Change
11-04-2006, 02:08 AM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
When my current tyres are due for replacement in a couple of months, I am toying with changing the tyre size.
Looking at PS2's -245/45 X 17, can't get PS2's in my standard size tyres (225/50 x17).
I am getting different advice on different websites, on 1010tyes site, they say that 245/45 are Ok on 7.5 rims.
The tyre bibles suggest a minimum of 8 inch rims for 245/45
What are the views here?
Any problems with mounting 245/45's on 7.5 rims?
Looking at PS2's -245/45 X 17, can't get PS2's in my standard size tyres (225/50 x17).
I am getting different advice on different websites, on 1010tyes site, they say that 245/45 are Ok on 7.5 rims.
The tyre bibles suggest a minimum of 8 inch rims for 245/45
What are the views here?
Any problems with mounting 245/45's on 7.5 rims?
11-04-2006, 02:52 AM
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My Ride: Titanium Silver 2004 525i, style 116 alloys,
That's a good question. I have the same sized rim.
Personally I wouldn't go any higher than 235 on a 7.5 inch rim.
I think the cooper tire website has a chart on recommended rim:tire width
Personally I wouldn't go any higher than 235 on a 7.5 inch rim.
I think the cooper tire website has a chart on recommended rim:tire width
11-04-2006, 03:50 AM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by Markymark' post='352238' date='Nov 4 2006, 11:52 AM
That's a good question. I have the same sized rim.
Personally I wouldn't go any higher than 235 on a 7.5 inch rim.
I think the cooper tire website has a chart on recommended rim:tire width
Personally I wouldn't go any higher than 235 on a 7.5 inch rim.
I think the cooper tire website has a chart on recommended rim:tire width
Hmm, then 235/50 or 235/45
11-04-2006, 12:43 PM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
The calculator on the Rochford Tyres site, suggests that 235/50 x 17 would be the only realistic option in a size available in PS2's.
http://www.rochfordtyres.co.uk/tyrecalc.asp
Any views out there?
http://www.rochfordtyres.co.uk/tyrecalc.asp
Any views out there?
11-04-2006, 12:55 PM
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My Ride: My ex-ride: EU '08 LCI 520dA. Space Grey, Sport Seats in Black Leather/Fabric Anthracite, Sport Steering Wheel, A/C with Extended Features, Hi-Fi Speakers, Cup Holders, Cruise with Braking function, Folding Rear Seats, Xenons, Park Distance Control.
Gee KAF,
You do you have to make this so hard?
First, you win nothing by having wider tyres on your winter rims.
Second, don't mess with the ET's. BMW has made a great setup.
I.e. the Styling 122 with 17" wheels and 245/45 are too wide for a
really good winter setup.
I strongly recommend that you search for a Styling 138 setup with
good 225/50 17" wintertyres.
If you really need chains for you tyres in the Alps, the 225 setup works better.
You do you have to make this so hard?
First, you win nothing by having wider tyres on your winter rims.
Second, don't mess with the ET's. BMW has made a great setup.
I.e. the Styling 122 with 17" wheels and 245/45 are too wide for a
really good winter setup.
I strongly recommend that you search for a Styling 138 setup with
good 225/50 17" wintertyres.
If you really need chains for you tyres in the Alps, the 225 setup works better.
11-04-2006, 01:52 PM
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My Ride: F11 535i M-Sport,, Silver, Black Leather, LED Adaptive headlights
Model Year: 2015
Engine: N55
Originally Posted by Ricracing' post='352406' date='Nov 4 2006, 09:55 PM
Gee KAF,
You do you have to make this so hard?
First, you win nothing by having wider tyres on your winter rims.
Second, don't mess with the ET's. BMW has made a great setup.
I.e. the Styling 122 with 17" wheels and 245/45 are too wide for a
really good winter setup.
I strongly recommend that you search for a Styling 138 setup with
good 225/50 17" wintertyres.
If you really need chains for you tyres in the Alps, the 225 setup works better.
You do you have to make this so hard?
First, you win nothing by having wider tyres on your winter rims.
Second, don't mess with the ET's. BMW has made a great setup.
I.e. the Styling 122 with 17" wheels and 245/45 are too wide for a
really good winter setup.
I strongly recommend that you search for a Styling 138 setup with
good 225/50 17" wintertyres.
If you really need chains for you tyres in the Alps, the 225 setup works better.
I would never put wider tyres on for winter, even I am not that stoopid.............well not quite
I was hoping to use PS2's as summer replacements, it looks like the 235/50 are about the only size that would reasonably fit my 7.5 rims. If Michelin made them in 225/50 I would not have raised the question.
11-04-2006, 05:11 PM
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I got a confirmation from Tire Track sponsor over at Bimmerfest forums that the maxmium size tires you can put on the standard 17" wheels with no safety issues is 245, 45, 17.
Here is the link http://www.bimmerfest.com/forums/sho...d.php?t=151602
Here is the link http://www.bimmerfest.com/forums/sho...d.php?t=151602
11-05-2006, 05:20 AM
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Originally Posted by KAF' post='352427' date='Nov 4 2006, 10:52 PM
I was hoping to use PS2's as summer replacements, it looks like the 235/50 are about the only size that would reasonably fit my 7.5 rims. If Michelin made them in 225/50 I would not have raised the question.
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